Ion exchange waste water denitrification material and preparation method thereof

An ion exchange and denitrification technology, applied in ion exchange, ion exchange water/sewage treatment, cation exchange, etc., can solve the problems of poor hydrophilicity, and the microorganisms are not easy to hang on the membrane. Nitrogen removal and biochemical effects

Inactive Publication Date: 2011-03-30
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Nowadays, elastic fillers and combined fillers are widely used in China, but they all have disadvantages such as microorganisms are not easy to hang film and poor hydrophilicity. Therefore, it is of great significance to develop a new type of waste water denitrification filler.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Sodium Thiocyanate 55%

[0032] Polyvinyl alcohol 17%

[0033] Sodium polymethacrylate 13%

[0034] Azobisisobutyronitrile 0.15%

[0035] Sodium dodecyl sulfonate 1.7%

[0036] EDTA tetrasodium salt 0.15%

[0037] Montmorillonite 13%

[0038] Sodium thiocyanate, polyvinyl alcohol, sodium polymethacrylate, and sodium dodecyl sulfonate were added to the reactor in the above proportions. When the reaction temperature is controlled at 60-70°C, azobisisobutyronitrile is added to initiate the polymerization reaction for 6h-8h, then ethylenediaminetetraacetic acid tetrasodium salt is added to terminate the polymerization reaction, nano-montmorillonite powder is added, and the repolymerization time is 0.5 ~2h or so, a viscous liquid can be obtained as a spinning stock solution for later use.

[0039] The processing steps of the wet spinning include: coagulation, stretching, heat setting, acetalization, water washing, drying and other steps. The coagulation bath temperatu...

Embodiment 2

[0041] Sodium Thiocyanate 57%

[0042] Polypropylene alcohol 15%

[0043] Sodium polymethacrylate 10%

[0044] Azobisisobutyronitrile 0.2%

[0045] Sodium dodecylbenzenesulfonate 1.6%

[0046] Acetic acid 0.2%

[0047] Kaolin 16%

[0048] Sodium hydrogen sulfide, polypropylene alcohol, sodium polymethacrylate, and sodium dodecylbenzenesulfonate were added to the reaction kettle according to the above proportions. When the reaction temperature is controlled at 70-80°C, azobisisobutyronitrile is added to initiate the polymerization reaction for 7 hours, then acetic acid is added to terminate the polymerization reaction, nano-kaolin powder is added, and the polymerization time is about 1.5 hours, and a colorless transparent viscous liquid can be obtained. Use as spinning stock solution.

[0049] The processing steps of the wet spinning include: coagulation, stretching, heat setting, acetalization, water washing, drying and other steps. The coagulation bath temperature was ...

Embodiment 3

[0051] Sodium Thiocyanate 50%

[0052] Polypropylene alcohol 21%

[0053] Sodium Polyacrylate 19%

[0054] Potassium Persulfate 0.1%

[0055] Sodium Lauryl Sulfate 1.75%

[0056] Acetic acid 0.15%

[0057] Diatomaceous earth 18%

[0058] Sodium sulphate, polyacrylonitrile alcohol, sodium polyacrylate and sodium lauryl sulfate were added to the reaction kettle according to the above proportions. When the reaction temperature is controlled at 70-80 °C, potassium persulfate is added to initiate the polymerization reaction for 8 hours, then acetic acid is added to terminate the polymerization reaction, nano-diatomite powder is added, and the polymerization time is about 1 hour, and a colorless transparent viscous liquid can be obtained as a spinning material. Silk stock solution for use.

[0059] The processing steps of the wet spinning include: coagulation, stretching, heat setting, acetalization, water washing, drying and other steps. The coagulation bath temperature was ...

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PUM

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Abstract

The invention relates to an ion exchange waste water denitrification material and a preparation method thereof. A segmented copolymer containing a polyolefin acetal chain segment and a polyolefin sodium carboxylate chain segment is prepared from polyolefin alcohol and polyolefin sodium carboxylate which have low polymerization degree, as well as aldehydes, kieselguhr, kaolin, imvite and the like under the action of an initiator. The copolymer has sodium carboxylate groups, can be used as cation exchange resin, and performs the exchange with NH4<+> in waste water;and the roughness of the material can be increased by adding inorganic nanometer powder soil, and the specific surface area is increased to improve the hydrophily and affiliation capacity of microbes. The preparation method comprises the following steps of: dissolving the polyolefin alcohol and the polyolefin sodium carboxylate by using NaSCN solution, adding the initiator for polymerizing, adding a terminator and inorganic nanometer powder, stirring and mixing uniformly to prepare spinning solution, coagulating the spinning solution with inorganic salt solution in coagulating bath to form nascent fibers, performing post processing processes such as drawing, heat setting, acetalation, washing, drying and the like, and weaving to form a specific shape to obtain the required product. The material has the good mechanical strength, hydrophily, microbe affinity and ion exchange performance.

Description

technical field [0001] The invention belongs to the field of wastewater treatment functional materials, in particular to a preparation method of an ion exchange type wastewater denitrification functional material. Background technique [0002] With the improvement of people's living standards, the requirements for environmental quality are also getting higher and higher. Since the 1980s, the water bodies of many lakes and reservoirs in my country have tended to become eutrophic and have aggravated trends, such as the eutrophication of Taihu Lake, Dianchi Lake, Guanting Reservoir and other water bodies, which has constituted a great restriction on the development of ecosystems and social economy. and influence. Nitrogen pollution of water quality will bring serious harm to aquatic animals, plants and humans. In this severe situation, it is necessary to study efficient wastewater denitrification materials. [0003] In recent years, the biofilm method has been more and more wi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J39/18C02F1/42C02F101/16B01J39/17
Inventor 刘景明朱志荣
Owner TONGJI UNIV
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